white glue is not tacky at all - and sould have some real trouble getting stuff to stick to a wall without tonnes of temporary tape. This WOULD work if you made the mosaic on the ground on plywood, then screwed to the wall. Other prob is then that I dont think white glue would be all that good on porcelain (particularly glazed). Choose an adhesive designed for the task at hand!

Ah. I hadn't thought of the tackiness. I just asked because it seems the strength and usefulness of white glue is seriously underrated compared with more expensive products. But of course it has its limitations, as with any product.

ya gorilla glue is amazing i actually glued my sludge hammer handle back together with the stuff and put a couple wraps of duck tape on it and used it to drive steaks for the fireworks tent last year. but ya if you could kinda rough up the gluing surfaces it will help the glue stick